# FireAngel CO Detector FA3820 with 10-year sealed battery, carbon monoxide alarm

**URL:** https://aio.lv/en/product--fireangel-fa3820--8490721
**Data updated:** 2026-03-07 15:17 (EET)
**Category:** Sensors & Detectors
**Manufacturer:** FireAngel
**Manufacturer code:** FA3820
**EAN:** 0816317006037
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 48.49 €
**Prices and availability valid until:** 2026-07-12 23:59
**Price without VAT (21%):** 40.07 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--fireangel-fa3820--8490721

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 22.06.2026 | free |
| Pickup points | 29.06.2026 | 1.99 EUR |
| Courier delivery to door | 29.06.2026 | 4.99 EUR |

## Summary description

FireAngel CO Detector FA3820 is a carbon monoxide alarm designed for continuous home safety monitoring. It features a sealed 10-year battery to avoid regular battery changes and ensures long-term operation. The device detects dangerous CO levels and provides audible alerts to warn occupants, suitable for installation in living spaces, bedrooms and near fuel-burning appliances.

## Long description

FireAngel CO Detector FA3820 with 10-year sealed battery is a carbon monoxide alarm designed for continuous domestic monitoring of CO levels. The unit contains an integrated sealed power source intended to provide up to 10 years of operation without battery replacement, and an electrochemical sensor calibrated to detect elevated carbon monoxide concentrations and trigger an audible alarm. The compact housing and simple controls make the detector suitable for mounting on walls or ceilings in living areas, bedrooms and near fuel-burning appliances.
Advantages
The FireAngel CO Detector FA3820 offers long-term reliability through its sealed 10-year battery, reducing maintenance and the risk of power loss due to removed batteries. An electrochemical sensing element provides consistent and accurate detection of carbon monoxide, and the device emits a clear audible alarm when unsafe levels are detected. The detector is compact and unobtrusive, designed for easy installation and regular domestic use without the need for routine battery changes.
Suitable for
 Homes with gas boilers, wood-burning stoves or fireplaces
 Bedrooms and living rooms to provide continuous monitoring while occupants sleep
 Garages and utility rooms where fuel-burning appliances are installed
 Households seeking a low-maintenance CO detection solution
Key specifications
 Detection type: carbon monoxide (CO)
 Power source: sealed non-replaceable battery designed for up to 10 years of operation
 Sensing technology: electrochemical CO sensor
 Alert: audible alarm for elevated CO levels
 Mounting: wall or ceiling installation
 Intended environment: indoor residential use
How to use
Install the detector according to manufacturer placement guidance, typically on a wall or ceiling in the rooms to be monitored and away from direct drafts or strongly ventilated areas. Use the mounting template or bracket supplied to fix the unit securely, and test the device after installation using the test button to confirm the audible alarm and operation. Maintain a clear area around the detector and follow the product manual for end-of-life signals indicating when the device should be replaced.
Usage recommendations
Locate the detector close to sleeping areas and fuel-burning appliances, avoiding corners, very dusty places and locations directly above stoves or cooking appliances. Test the alarm periodically, keep vents and airways unobstructed, and replace the detector at the end of its operational life as indicated by the device to ensure continued protection against carbon monoxide exposure.

## FAQ

### How much does the FireAngel CO Detector FA3820 cost, and is it available for purchase?

The price is 48.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 77 pcs. are in stock, and you can place your purchase right now with delivery across Latvia and Europe or choose pickup at the Riga collection point. We offer favorable purchase terms, including the option to split the payment into convenient monthly installments. Availability and price are updated in real time, so we recommend placing your order in advance.

### If I order this product today, when will I receive my order?

If you place your order today, delivery will be as fast and convenient as possible. You will be able to pick up your order on 22.06.2026 at the Riga pickup point or choose delivery across Latvia and Europe. We carefully inspect every purchase and pack it securely for safe transportation.

### What payment options are available?

AiO.lv offers several payment methods: Bank transfer, Bank cards on-line, Apple Pay, Google Pay. All transactions are 100% secure and encrypted.

### Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

### What is the warranty period?

All FireAngel products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized FireAngel service centers and through AiO.lv

### Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

### Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. More information about warranty service: https://aio.lv/en/warranty

## Image

https://aio.lv/img/cache/product/8490721/51493862_large.webp